| OCR Text |
Show that this represented a ( profile proffle ) 545 of the river , showing the height of the river at the time the survey was made . During the progress of the survey frequent elevations are made of the water surface , and in connection with the drawing of the plan of the map they make a ( profile proffle ) , which is a vertical ( section section' section ) of the river , based on elevations ( established estuablished ) at the time the survey was made . ( Prom From ) the profile he is able to determine what sections of the river ( con- con ) tain rapids . He stated that rapids are in various slopes ; ohe may have a fall of five feet in one hundred yards , or a swifter one a fall of ten feet in one hundred yards . ( R . 1871 . ) As a rule , when water ( has has' has ) ( 'a a ) gradient of ten feet to the mile , there would be a lot of rapids in that mile . He stated that the topographers took elevations above and below each rapid , and that is done with an instrument . ( R . 1872 . ) Referring to ( Oompl Compl ) . Exh . No . 10 , Page 55 , Sheet T , just for the ( pur pur- pur ) ¬ pose of the record , to illustrate , take on this same sheet you refer to from mile 204 to mile 206 the , , drop in ( there here ) is the difference between 3,765 and 3,792 ; that ( would -would would ) be about 27 feet in those two miles . To get that : This is elevation [ indicating ] : here [ indicating ] , this 3,760 or 3,765 , is practically the surface of the stream ; at mile 204 it continues to rise to 3,770 at that point , 3,775 , 3,780 , 3,785 , 3,790 at No . 205 ; then it goes up to 3,795 about ( there fliere ) , and 3,797 at that point . Each one of those aa : '07- ( 31-vo 31vo ) ! . . 1-- -35 |
